The East Sea, with its characteristics and advantages, has become a place of fierce competition between large and small countries with the goal of gaining many benefits in this area. Therefore, this is considered a disputed area in both the past and present. Disputes in the East Sea are always a hot topic because they involve the interests of many involved countries. For Vietnam, a maritime country that relies heavily on resources from the sea as well as maritime trade, the East Sea has become even more important to ensure the national security of this country. This article focuses on assessing the important role of the East Sea, examining disputes between countries, and clarifying Vietnam's standpoint, as well as historical and legal evidence on maritime sovereignty disputes issues in the East Sea.

This article considers the similarities and differences between listening and reading, and then looks specifically at why the activation of prior knowledge is perhaps even more important in listening than in reading comprehension. Finally, there is a concrete example of activating prior knowledge in listening materials.